<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript">
		/*+*/
			var a;
			a=1+true;
			console.log(a);
			a=a+NaN;
			console.log(a);		
			a="hello"+
				"world";
			console.log(a);
			a=1+"23";
			console.log(a);
			console.log(typeof a);
			a=123+"";
			console.log(a);
			console.log(typeof a);
		/*-*/
			a=100-"2";
			console.log(a);
		/*乘法*/
			a=2 * "3";
			console.log(a);
		/*除法*/
			a=10/2;
			console.log(a);
		/*取余*/
			a=10%3;
			console.log(a);
		</script>
	</head>
	<body>
	</body>
</html>
